Table 2.

Prevalence of past-year cannabis use at each data collection timepoint using all estimated available data

	Age 13 years (n=5710)	Age 14 years (n=5599)	Age 15 years (n=4960)	Age 16 years (n=4804)	Age 17 years (n=3850)	Age 18 years (n=3178)	Age 20 years (n=3967)	Age 22 years (n=3641)	Age 24 years (n=3527)
Do not use	5516 (96·6%)	5460 (97·5%)	4483 (90·4%)	4330 (90·1%)	3113 (80·9%)	2661 (83·7%)	2780 (70·1%)	2711 (74·5%)	2536 (71·9%)
Occasional use	176 (3·1%)	106 (1·9%)	329 (6·6%)	317 (6·6%)	569 (14·8%)	371 (11·7%)	973 (24·5%)	748 (20·5%)	771 (21·9%)
Regular use	18 (0·3%)	33 (0·6%)	148 (3·0%)	157 (3·3%)	168 (4·4%)	146 (4·6%)	214 (5·4%)	182 (5·0%)	220 (6·2%)

Data are n (%).